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Papermaking and Ink Chemistry of 'United States Three-Cent Bank Note'

机译：“美国三美分纸币”的造纸和油墨化学

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U.S. three-cent green postage stamps manufactured under governmental contracts with three different private bank note companies were studied concerning paper properties and ink composition. Stamp paper analyses revealed that each of the companies was using paper with different properties. Moreover, through the bending index measurement and calculation of population distribution of bending indices for each stamp manufacturer it was found that National BNC used two discrete types of paper, one with a bending index 85-115 GU/g reaching 52% of total tested samples, the other stiffer with a bending index 115-159 GU/g. The Continental BNC population (88%) had the bending index in the range 69-142 GU/g, the rest was within 142-192 GU/g bending index. Possibly three different papers were used by the American BNC within the first period (1879), one (20%) with bending index 66-89 GU/g, a second (52%) with bending index 89-113 GU/g, and a third (28%) with bending index in the range of 113-145 GU/g. The re-engraved issue (1881) was printed on two different papers, one (70% of population) with bending indices in the range 59-100 GU/g, and the other with bending indices in the range of 100-128 GU/g. "Green" as recognized by philatelists was found to be different for every manufacturer in terms of CIELAB values.
机译：研究了与三个不同的私人钞票公司根据政府合同生产的三美分绿色邮票，其中涉及纸张特性和墨水成分。邮票纸分析表明，每个公司都在使用具有不同特性的纸张。此外，通过测量弯曲指数并计算每个邮票制造商的弯曲指数的总体分布，我们发现National BNC使用了两种离散类型的纸张，其中一种的弯曲指数为85-115 GU / g，达到了测试样品总数的52％ ，另一种更坚硬，其弯曲指数为115-159 GU / g。大陆BNC人群（88％）的弯曲指数在69-142 GU / g的范围内，其余的弯曲指数在142-192 GU / g的范围内。美国BNC可能在第一时期（1879年）使用了三篇不同的论文，其中一篇（20％）的弯曲指数为66-89 GU / g，第二篇（52％）的弯曲指数为89-113 GU / g，并且三分之一（28％）的弯曲指数在113-145 GU / g的范围内。重新刻印的版画（1881）打印在两张不同的纸上，其中一张（占人口的70％）的弯曲指数在59-100 GU / g范围内，另一张的弯曲指数在100-128 GU / g范围内G。集邮家认可的“绿色”对于每个制造商而言在CIELAB值方面是不同的。

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